Christopher hill



G. HILL. 'Grates'for Boiler-Furnaces. -N0.V2-24,688. Patented Feb1l7, 1880.-

N Pwifls. PHOTO UTNOGRAPHEIL WASHINGTON. D. O-

- UNITED STATES PATENT OFFICE.

CHRISTOPHER HILL, OF POPLAR, ENGLAND.

GRATE FO R BOI LER-FU RNAC ES.

, SPECIFICATION forming part of Letters Patent No. 224,688, dated February 17, 1880.

Application filed June 25, 1879. Patented in England, December 12, 1878, and February 18, 1879.

To all whom it may concern Be it known that I CHRISTOPHER HI L, of Poplar, in the county of Middlesex, England, have invented new and useful Improvements in Grates for Boiler-Furnaces, of which the fire-bar archedupwa-rd in the center; and Fig. 2 is a cross-section of a furnace, showing an arrangement of fire-bars of similar construction.

A are the bearing-bars; B, the arched firebars, and G the space on the under side of the grate.

The bearing-bars, instead of being placed parallel to the front of the furnace, can be fixed at right angles thereto on the sides of the firebox, in which case the fire-bars are parallel to the front of the furnace. V ()n the fuel being ignited the air in passing through the space 0, formed by the arched construction or arrangement of the fire-bars,

I do not broadly claim a grate in which the bars are curved upwardly toward their center, as such construction of itself is not new.

I claim as my invention-- The combination of a series of firebars each formed independent of each other and with spacing-lugs, each bar being in the form of an arch, as shown, each of the ends of which is formed of two contrasting curves, all the bars being of the same thickness and depth, whereby a uniformity is produced, and the ready removal of and replacement of either is provided for without disturbing the adjacent set forth.

ones, as

G. HILL.

Witnesses:

GEO. E. VAUGHAN, 67 Chancery Lame, London.

G. F. WARREN, N 0mm Public, 17 Gmocchwch Street, London. 

